Constructing these puzzles is trickier than non-rebus ones as Crosshare's suggestions / autofill does not utilize rebus. I start with a general theme / seed, like the Led ___ clues in this puzzle, and it usually takes trial and error and messing around with the size of the grid and the locations of the bars and black squares to fill the grid. In order to find words / phrases that fit a certain pattern (such as filling 4D with the given YLIN), I use Crosserville's (https://www.crosserville.com) lookup tool (by entering ..YLIN.. , it gives me SKYLINES and GUYLINER). It takes a lot of fiddling but is enjoyable to construct. Thank you for consistently showing interest in my little puzzles :)